Injector



(Model.)

W. J. SHE'RRIPF.

INJEGTOR.

Patented Deo. v22, 1.885.

Mzses.

07M fmof/L' UNITED STATES PATENT erica.

WILLIAM J. SHERRIFF, OF ALLEGHENY CITY, PENNSYLVANIA.

INJECTQR.

SPECIFICATION forming part of Letters Patent No. 332,953, dated December22,1885.

Application filed December 10, 1884. Serial No. 149,943.

To a/ZZ whom it may concern:

Be itknown thatl, WILLIAM J. SHERRIFF, of Allegheny City, in the countyof Allegheny and State of Pennsylvania, have invented a new and usefulImprovement in Injectors; and Ido hereby declare the following to be afull, clear, and exact description thereof, reference being had to theaccompanying drawings, in which- Figure l is a longitudinal sectionalview of my improved injector on the line a: x of Fig. 2. Fig. 2 is anedge view of the same.

Like letters of reference indicate like parts wherever they occur.

rlhe object of my invention is to simplify, cheapen, and improve theconstruction of injectors.

In the drawings, a is the shell, having its body divided into threecompartments, c', a", and d, by diaphragms or partitions a3 and at.Within these partitions are two nozzles, b and c, the nozzle b being asteam-nozzle, and c a water ejecting or lifting nozzle. The nozzle bextends into the chamber a from the steamchamber d, and the nozzle cextends from the chamber c into -the chamber a2 through the diaphragmat. A partition,a5,supports a third nozzle, e, which establishescommunication be` tween the chamber a2 and a chamber, a6. The nozzle eis in line with the other two nozzles, b and c. The chamber c6 has adirect lateral communication witha discharge-pipe, f, which leads to theboiler. The shell c is provided with a steam-pipe, rZ, leading into thesteam-chamber d, and the latter chamber is separated from the otherparts of the inj ector by the partition a3, except a steam-port, g,communicating with the steam-chamber and the chamber a through thepartition c3 and the nozzle b, which admits steam from the chamber Zinto the chamber c. rEhe chamber a is the induction-chamber, and theshell ais provided with two induction-pipes, Zt7t,which enter thischamber directly from opposite sides of the injector. At the base of theshell, and out of line with thenozzles bc e, isa waste oroverflowporaz', which communicates with the chamber a6. The nozzles areput in place through openingsin the upper and lower sides of the shella, which are closed by screwplugs 7c and Z, these openings being inalignnient with the nozzles. The upper plug, Z,

(Model.)

. serves as a fulcrum for a lever, m, which is pivoted thereto.Connected with the lever m on one side of the fulcruni Z is a stem, n,having a valve, n', at its lower end, arranged to close the steam-port gby being seated in a conical seat at the upper end of the port. On theother side of the fulcrum Z, and pivoted to the lever ms anothervalve-stern, 'having a valve, Z2, at its lower end, arranged to closethe overflow-port, Z when depressed to its scat thereon. The valves nand t2 are adj ustable by changing the height of the fulcrum, which maybe done by thc screw-plug fitting into the shell on.

The operation of the device is as follows: To start the injector', theport g is closed by depressing the lever m, andthe overflow-port t' isopened by the same operation. Steam being admitted into the pipe dpasses from the chamber d through the nozzle b into and through the headc, producing a vacuumin the chamber a, raising water into this chamberthrough the induction-pipes It t, and discharging it through the head cinto the nozzle e and chamber a, whence it escapes through the overliowt'. lVhen the current is established, theleverm is slowly raised,thereby gradually opening the port g and closing the discharge-port t'.Steam will then pass through the port g into the chamber Zz and aroundthe nozzles c and e, between which it forms an annular jet,which strikesthe water in the nozzle e and impels it therethrough and through thechamber a6 to the overflowport 'Z'. When steam has ceased to comethrough the latter opening, and the chamber a6 is well filled withwater, the lever m is raised so as to open the steam-port g and to closethe overflow-valve t' completely, when the water will escape through thepipef to the boiler. A slow regular lift of the lever-handle is all thatis necessary to eii'ect the whole of this operation, because theclosing. of the valvez and the opening of the valveg are simultaneouslyperformed, and by the time when these parts are respectively opened andclosed the 4current of water through the injector will have been wellestablished. Cold water from a well or hydrant is drawn into the chambera through the induction-pipe h. The opposite pipe, h', is connected withthe condenser or waste-water chamber usual in boilers, and

ICO

heated Water is drawn from thence. should be had that not enough hotwateris induced into the chamber a that when mingled with cold waterfrom the pipe h the resultant may be unduly hot and prevent thenecessary condensation of steam in the ejectorhead- The amount of hotWater used can be conveniently regulated by athrottle or cock on thepipe h. Vhen the hot-water pipe 7L is not desired to be used, it may beuncoupled, and the hole in the injector-shell closed by a plug.

The advantages of the construction of the induction-pipes herein shownare that they introduce the Water directly into the chamber a withoutallowing it first to come into contact with and chill the other partsofthe injector, and by the use of two pipes I am enabled to utilizetheheated water of the con-v densingchamber in a manner unknown heretofore.

The construction of the valves n and t2, in combination with the simplelever m, en ables the valves to be opened and closed by a simultaneousand gradual movement of the lever-handle, and as both valves seat down'-ward in the direction of the impelling force of steam or water they willsecurely close their respective ports.

It will be observed that the plugs Z and k Care l and nozzles e, c, andb are all in alignment, 3o

and that by removing the plugs all the nozzles maybe unscrewed andremoved for the purpose of repairing Without the necessity of detachingthe injector from the boiler.

I am aware that injectors have been employed having a steam-valve and anoverliowvalve arranged to be operated by the movement of the same lever,and I am also aware that nozzles and plugs have been arranged in aninjector in a line with each other, and I do not desire to claim thesefeatures, broadly.

Having thus described my improvement so that others skilled in the artto which it appertains may manufacture and use it, what I claim as myinvention, and desire to secureby Letters Patent, is-

The combination, in aninjector, of a lifting or ejecting head or nozzle,a Coldwater-induction pipe, and a hot-waterinduction pipe,

both of said pipes communicating with the said liftinghead,substantially as and for the purposes described.

In testimony whereof I have hereunto set my hand this 2d day ofDecember, A.. D. 1884.

VILLIAM J. SHERRIFF. NV i t nesses:

W. B. CORWIN, THOMAS W. BAKEWELL.

